2017/10/31 by Denis Gagnon, Joey Dumont, François Fillion‐Gourdeau +2 · 4 citations
Engineering · Physics and Astronomy · #Atomic physics #Bandwidth (computing) #Computer science #Diffraction #Excited state #Graphene #Laser #Laser-Matter Interactions and Applications #Materials science #Nanotechnology #Optics #Optoelectronics #Parametrization (atmospheric modeling) #Photon #Photon energy #Photonic and Optical Devices #Physics #Pulse (music) #Pulse shaping #Radiative transfer #Reciprocal lattice #Scattering #Telecommunications #Terahertz radiation #Terahertz technology and applications #cond-mat.mes-hall #physics.comp-ph #physics.optics #quant-ph
paper · pdf · doi:10.1364/josab.35.003021
published in Journal of the Optical Society of America B 35(12), 3021 (Optica Publishing Group) · Accepted for publication in JOSA B: https://www.osapublishing.org/josab/upcoming_pdf.cfm?id=332603
arxiv created 2018/11/03 · openalex publication_date 2018/11/13 · arxiv updated 2018/12/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The shape of a few-cycle terahertz (THz) laser pulse can be optimized to provide control over conduction band populations in graphene. To demonstrate this control in a theoretical way, a spectral parametrization of the driving pulse using B-splines is used in order to obtain experimentally realistic pulses of bandwidth ∼30  THz. Optimization of the spectral shape is performed via differential evolution, using the B-splines expansion coefficients as decision variables. Numerical results show the possibility of changing the carrier density in graphene by a factor of 4 for a fixed pulse energy. In addition, we show that it is possible to selectively suppress or enhance multiphoton absorption features by optimizing over narrow windows in reciprocal space. The application of pulse shaping to the control of scattering mechanisms in graphene is also discussed.